If you ever get the chance to ride around in one of these in the middle of the ocean do it because they bob around worse than a cork. And the get swamped easily and sink to the bottom of the Pacific like a stone. They had one here for rides and it sunk in the river once but people were not drowned.

When I was in the Army they were called, "Ducks" and soldiers said they were unsafe in a puddle of water.